https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89898 --- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- This was implemented by r9-3836 which is P0732R2: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0732r2.pdf